Thanks Glen and Erik.
Erik: As you will see below, I did add some extra interior to help strengthen the spindly wings. I made two extra ribs, filled in areas between ribs, added a balsa wing tip and finally, a 3/32nd inch square leading edge (balsa) that was all sanded and smoothed. It's just like making a balsa and tissue rubber powered model.
Skinning went ok with only a little miss match but things will still get tweaked and, of course, painted too!
Here it is mocked up attached to the fuse as a first attempt. I think it's going to work out alright.
Cheers,
Dan